'str' object has no attribute 'objects' django - django

Question

My views.py file is
def studentFeedBack(request):
studentid = ''
courseid = ''
teacherid = ''
if request.method == 'POST':
studentid_id = request.POST.get("studentid")
studentid = studentid.objects.get(id=studentid_id)
courseid_id = request.POST.get("courseid")
courseid = courseid.objects.get(id=courseid_id)
teacherid_id = request.POST.get("teacherid")
teacherid = teacherid.objects.get(id=teacherid_id)
description = request.POST.get("description")
rating = request.POST.get("rating")
studentFeedBack.objects.create(
courseid=courseid,
description=description,
studentid=studentid,
teacherid=teacherid,
rating=rating
)
return render(
request,
'forms/studentFeedBack.html',
{
'studentids':studentid.objects.all(),
'courseids':courseid.objects.all(),
'teacherids':teacherid.objects.all(),
}
)
and my models.py file is
class StudentFeedBack(models.Model):
feedbackid = models.AutoField(primary_key=True)
courseid = models.ForeignKey('Course', on_delete=models.CASCADE)
description = models.CharField(max_length=500)
submitdate = models.DateTimeField(auto_now_add=True)
teacherid = models.ForeignKey('schoolTeacher', on_delete=models.CASCADE)
studentid = models.ForeignKey('Student', on_delete=models.CASCADE)
option = [('Good','Good'),('Average','Average'),('Bad','Bad')]
rating = models.CharField(max_length=100, choices=option, default='none')
class Course(models.Model):
courseid = models.IntegerField(primary_key=True)
coursedescription = models.CharField(max_length=500)
coursename = models.CharField(max_length=50)
userid = models.IntegerField()
code = models.CharField(max_length=50)
videolink = models.FileField(default='default_link')
createddate = models.DateTimeField()
imagelink = models.URLField(default='default_link')
duration = models.DateTimeField()
longdes = models.TextField()
coursetype = models.CharField(max_length=50)
assignto = models.CharField(max_length=200)
status = models.BinaryField()
def _str_(self):
return self.coursename
class Meta:
db_table = "courseids"
class schoolTeacher(models.Model):
teacherid = models.IntegerField(primary_key=True)
name = models.CharField(max_length=50)
address = models.CharField(max_length=200)
email = models.EmailField()
contact = models.IntegerField()
passowrd = models.CharField(max_length=13)
image = models.ImageField(default='default.jpg')
regno = models.CharField(max_length=20)
joiningdate = models.DateTimeField()
def _str_(self):
return self.name
class Meta:
db_table = "teacherids"
class Student(models.Model):
studentid = models.IntegerField(primary_key=True)
regno = models.CharField(max_length=20)
name = models.CharField(max_length=50)
email = models.EmailField(max_length=50)
contactno = models.CharField(max_length=13)
registrationdate = models.DateTimeField()
address = models.CharField(max_length=200)
password = models.CharField(max_length=13)
imagepath = models.ImageField(max_length=100, default='default.jpg')
sectionid = models.IntegerField()
def _str_(self):
return self.name
class Meta:
db_table = "studentids"
and studentFeedBack html file has the following form
<form action="/studentFeedBack/" method="POST">
{% csrf_token %}
<label for="studentid">Student Id</label>
<!-- <input type="number" name="studentid"><br><br> -->
<select name="studentid" required>
{% for studentid in studentids %}
<option value="{{studentid.id}}">{{studentid.name}}</option>
{% endfor %}
</select><br><br>
<!-- <label for="courseid">Course Id</label>
<input type="number" name="courseid"><br><br> -->
<label for="courseid">Course Id</label>
<select name="courseid" required>
{% for courseid in courseids %}
<option value="{{courseid.id}}">{{courseid.coursename}}</option>
{% endfor %}
</select><br><br>
<label for="teacherid">Teacher Id</label>
<!-- <input type="number" name="teacherid"><br><br> -->
<select name="teacherid" required>
{% for teacherid in teacherids %}
<option value="{{teacherid.id}}">{{teacherid.name}}</option>
{% endfor %}
</select><br><br>
<label for="description" >Feedback</label>
<textarea class="form-control" rows="3" name="description"></textarea><br><br>
<label for="rating">Rating</label><br>
<input type="radio" id="Good" name="rating" value="Good">
<label for="Good">Good</label><br>
<input type="radio" id="Average" name="rating" value="Average">
<label for="Average">Average</label><br>
<input type="radio" id="Bad" name="rating" value="Bad">
<label for="Bad">Bad</label><br><br>
<button type="submit" class="btn btn-primary" >Submit</button>
</form>
The studentFeedBack model has foreign keys from student, schoolTeacher and Course. This is giving error on browser that 'str' object has no attribute 'objects'
Other than that my form is not giving any values in select options and that is also probably because of this error.

Answer 1

The design of the view is the issue
According to the line
studentid =''
studentid remains a string . You could try proper importation of the models.
Try:
views.py
from .models import Course, Student,schoolTeacher,studentFeedBack
def studentFeedBack(request):
#studentid = ''
#courseid = ''
#teacherid = ''
if request.method == 'POST':
studentid_id = request.POST.get("studentid")
studentid = Student.objects.get(id=studentid_id)
courseid_id = request.POST.get("courseid")
courseid = Course.objects.get(id=courseid_id)
teacherid_id = request.POST.get("teacherid")
teacherid = schoolTeacher.objects.get(id=teacherid_id)
description = request.POST.get("description")
rating = request.POST.get("rating")
studentFeedBack.objects.create(
courseid=courseid,
description=description,
studentid=studentid,
teacherid=teacherid,
rating=rating
)
return render(
request,
'forms/studentFeedBack.html',
{
'studentids':Student.objects.all(),
'courseids':Course.objects.all(),
'teacherids':schoolTeacher.objects.all(),
}
)
Alternatively, Django is superb at handing forms for models
https://docs.djangoproject.com/en/3.1/topics/forms/modelforms/#modelform
This will be better for your view as there is no validation at the moment
You could also have:
views.py
...
from django.forms.models import modelform_factory
from .models import studentFeedBack
def studentFeedBack(request):
fields=[
'courseid','description','studentid','teacherid','rating']
form=modelform_factory(studentFeedBack, fields=fields)
if request.method == 'POST':
form=modelform_factory(studentFeedBack, fields=fields, data=request.POST)
## Validates the data submitted
if form.is_valid():
## Creates a studentFeedBack instance
form.save()
## If form is invalid, it will fall through to the template with the incorrect data.
else:
### Handle the incorrect form
pass
return render(
request,
'forms/studentFeedBack.html',
{
'studentids':Student.objects.all(),
'courseids':Course.objects.all(),
'teacherids':schoolTeacher.objects.all(),
'form':form,
}
)
forms/studentFeedBack.html
<form action="/studentFeedBack/" method="POST">
{% csrf_token %}
{{form.as_p}}
</form>
https://docs.djangoproject.com/en/3.1/topics/forms/#working-with-form-templates
You may need to add a verbose_name attribute to your model fields:
models.py
class StudentFeedBack(models.Model):
...
teacherid = models.ForeignKey('schoolTeacher', on_delete=models.CASCADE, verbose_name="Teacher")
...
https://docs.djangoproject.com/en/3.1/ref/models/fields/#verbose-name
Customize as needed.
I hope this helps you understand Django better.
Edit
The function-based view has the same name as an imported model
For the first view:
from .models import Course, Student,schoolTeacher
from .models import studentFeedBack as studentFeedBackModel
def studentFeedBack(request):
#studentid = ''
#courseid = ''
#teacherid = ''
if request.method == 'POST':
studentid_id = request.POST.get("studentid")
studentid = Student.objects.get(id=studentid_id)
courseid_id = request.POST.get("courseid")
courseid = Course.objects.get(id=courseid_id)
teacherid_id = request.POST.get("teacherid")
teacherid = schoolTeacher.objects.get(id=teacherid_id)
description = request.POST.get("description")
rating = request.POST.get("rating")
studentFeedBackModel.objects.create(
courseid=courseid,
description=description,
studentid=studentid,
teacherid=teacherid,
rating=rating
)
return render(
request,
'forms/studentFeedBack.html',
{
'studentids':Student.objects.all(),
'courseids':Course.objects.all(),
'teacherids':schoolTeacher.objects.all(),
}
)